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Questions tagged [baud-rate]

"baud-rate" refers to the number of signal or symbol changes that occur per unit time. This tag is for questions that get, set, or otherwise manipulate the baud rate.

In telecommunications and electronics, baud (/ˈbɔːd/, unit symbol "Bd") means symbols per second or pulses per second. A symbol being one of several voltage, frequency, or phase changes.

Thus a "baud-rate" refers to the number of signal or symbol changes that occur over time—most commonly per second. A baud rate differs from a bit-rate in that a single symbol transition (baud) can communicate more than one bit during the interval, whereas a bit rate is a single bit per interval. However, if only two symbols are defined for some system, e.g. "0" and "1", then the baud/bit rates are synonymous.

This tag is OS and Language independent, as long as there's a mechanism for manipulating the serial data rate this tag can apply.

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Baud rate in PIC18F4550

for computing the baud rate for PIC18F4550, the following equation is used: Baud = F_OSC/(4 * (SSPADD + 1)) ---------- eq.1 according to the data sheet: SSPADD = 10 for 400k Baud at 20Mhz Fosc. But by substituting the parameters into equation (1),…
user1077980
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How to change the Baud Rate for bluetooth?

I have a device which keeps dropping my bluetooth headset when I do other bluetooth intensive operations like sending a file via BT to another device. I was thinking that the problem might be that the baud rate is set too low for the device. By the…
tarotcard
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Serial port won't accept baud rate

I am trying to setup a serial port on centos but can't get it to work. this is the code that I'm having trouble with. tcgetattr(idComDev[i], &options); // get current settings printw("default baudrate is %d ", cfgetispeed(&options)); …
Skeith
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I can't see the output from Serial.print. Why?

I have been trying to setup a program analyzing stock-prices for quite some time. I didn't manage to get any output however, so I decided to do some testing with simpler programs... MUCH simple programs. Right now I can't even manage to get "Hello…
Thegreen
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Can you read from serial buffer without knowing baudrate?

I'm just wondering why it's necessary to know the baud rate when reading serial data from the buffer with PySerial. Shouldn't the byte data in the buffer be the same regardless of 9600 or 38400 baud rate, with the exception that the latter fills…
sethdhanson
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PlatformIO monitor_speed not working. Setting Ignored in .platformio.ini

This has been working for me in the past 2 years -- and all of sudden stopped working. Opening the Monitor always occurs at the default 9600 baud. I tried uninstalling and reinstalling PlatforIO ... but to no avail. Is there an additional setting…
AmitR
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ESP8266 not working after baud rate change

Hello guys I have my ESP8266 connected to my Arduino. Then I typed in AT in the serial monitor. It confirmed this command with OK. After that I typed in AT+UART=9600, 8, 1, 0, 0 which gave me the response ERROR. Then I googled what I could do,…
Da Ro
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How to change the baudrate of a serial port at runtime using C?

I have written some C code for aarch64-based SoC (Rockchip RK3399) with Debian 9 LXDE, to receive data from a GPS module. The GPS module is connected to "ttyS4" port in my SoC. I have created a pthread to receive data from the GPS module. I'm using…
Vibhu
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Setting baud rate of serial port fails on vxworks

I am writing a vxworks task involving sending data thru serial port. Opening the serial port is successful. But when I am trying to set the baud rate of the port using ioctl() system call, it fails. I am giving the code below. can anyone please shed…
Likhin M
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Is there any way we can change the default baud rate of FT230X devices in ubuntu 20.04 system?

I have an FT230X device from FTDI, Which is preconfigured for 115200 baud rate by default. For windows system, they have provided FT_PROG utility for changing settings, but for Linux FT2XX device driver is there. I am able to change the baud rate…
Vikas Singh
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How to get event for different baudrate?

I am working on native android application. In this application I am connecting hardware devices using usb cable, for this connection I used below library: https://github.com/felHR85/UsbSerial I have 3 different hardware devices and each device has…
Ayushi Detroja
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Boost ASIO Serial Communication with Arduino: Error above 9600 bps

I'm developing a C++ interface to communicate with na Arduino UNO which is running some code. To communicate with the Arduino, i'm using boost asio library. My application works well at a baud rate of 9600bps. Now, i wanted to communicate faster…
dias
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How can node.js local server be limited to a specific baud rate?

Is there a way to do this? I'm calling node.js server from a bat file: http-server -p 8080 -c-1 exit I read there is throttle, but there is NO info how it can be used in a command line for node.js server -if at all.
user5515
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Problem with serial port speed changing on BR300 or lower in c++ on Raspberry PI 3

I have to operate on serial port with baud rate equal BR300. However the commands cfsetspeed (&RSopt, (speed_t)B300); and tcsetattr (fd, TCSANOW, &RSopt); do not change the speed. As I've verified those commands work correctly for speeds B0 and…
Bob SO
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Bluetooth configuration problem Hc-05 with Arduino

I'm trying to set up my Bluetooth HC-05 but I'm having problems. I am using an Arduino Uno and I connect the bluetooth TX and RX cables to 0 and 1 of the Arduino. The code I am using is the following: #include SoftwareSerial…
jose
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